Fastener remover



Pee. 21 1926.

F. E. BERTRAND PASTE-NEH REMOVBR Filed May 22, 1922 I f/A/VENTUR.

Patented Dec. 21, 1926. I

rnnnnmcn. BERTRAND, or LYNN, massaonnssrrs, ASSIGNOR T0 unrr'nn sHon MACHINERY CORPORATION, or rarnnson, NEW JERSEY, A CORPORATION OF 'N W JERSEY. I

v FASTENER REMOVER.

Application filed May .22, 192a Serial No. 562,915.

This invention relates to the removalof temporary fasteners such as are used to clamp heels to shoes and. lasts, and 1s illustrated as embodied in a power-drivenscrew removing machine,

According to an improved method of at-- taching heels disclosed and claimed in copending application, Serial No. 367,173, filed March 19, 1920, in the name of M, ,V. Bresnahan, each heel is clamped temporarily against the heel seat of a shoe on a perforated last by'means of a screw fastener pass;

ing through the perforation in the last and through the heel seat of'the shoe into the heel. This fastener holds the last and shoe and heel tightlyclamped together during the drying of the adhesive between the heel and shoe, while at the same time permitting the shoe to be finished during the drying of the adhesive, since the exterior of the shoe is entirely unobstructed.

An object of the present invention is a) provide "an improved screw removing machine for removing such temporary fasteners after they have served their purpose.

Tothi's end, andas illustratively shown in the drawings, a novel form of power-driven continuously rotating screw-engaging. tool is mounted in position to permit an operator freely to present the work thereto, and the 7 tool itself is so constructed 'as to facilitate the establishment of turning engagement with the work without requiring the exercise. of any particular amount of care on the part of the operator in the presentation of the Thus the operator work to the machine. may take shoes successively from a rack, present each shoe tothe screw removing device and then return the shoe to the rack without losing time or finding it necessary to shift his hold upon the shoe. As the above-described screw fasteners are formed with heads in the form of circulareyes, the novel screw-engaging tool is formed with a substantially semi-' spherical recess to receive suchan eye, and a groove intersects the recess and 1s formed with parallel sides for embracing theeye of' the fastener so as to enable the tool to turn the fastener. In order, however, to enable driving connections between-the tool head.

and the fastener to be established without undue abruptness the eye-engaging groove is so designed that it terminates short of the bottom of the tool head so as not to interrupt Fig. l is a side elevation of a screw removing machine partly broken away to show the operating mechanism;

away, at right angles to one another, showing the construction of the screw-engaging tool head,"

Fig. 4 is a diagrammatic viewishowing the use of the. machine; and" Fig. 5 is a plan view of the tool head shown in Figs. 2 and 3.

As shown in Fig. l'the machineis driven from an electric motor 10 mounted on a'suitable base 12 which may be formedto en close a switch, or a switch and rheostat. A

vertical shaft or spindle l l'carries' a screw engagingltool or head 16 at one end and a bevel gear 18 at the opposite end which is arranged to, be driven by a bevel gear '20 carried by the armature shaft 22 of motor 10. If desired, gears 18 and 20 may be arranged in a suitable casing to run in oil, as Y I V c illustrated. v

As'best shown in F igs; 2 and 3, the improved screw removing tool or head 16 is formed with a semi-spherical recess or socket 24: of such acurvature as to fit over the eye ,or head of a temporary fastener such as shown atF in Fig. 4. An aperture 26 extends through the tool head 16 at rightanture intersecting theaxial center line of the tool headand openinginto the base of the semi-spherical recess 24 to provide a groove 7 or slot 28 adapted to receive the eye or head of the fastener, the groove having parallel sides to embrace the fastener for the pur-;

interrupt the continuity of the wall or surface at the mouth of the recess, This con '60 111 the accompanying. drawings,

' gles to the axis of the spindle 14, said'aperstruction permits the eye or head of the'fas it 65 Flgs 2 and 3 are elevatlons, partly broken tener advantageously to be thrust against the smooth rim of the soelzet and introduced a substantial distance into the socket before turning engagein is esta lished \vithjthe fastener. Thus the operator niay present the work to the machine without exercising any particular care accurately tol'ocate the fastener with respect-to the driving slot in the tool. Thereafter positive oriving engagement with the fastener maybe efiected. mere ly by pressing the work toward the tool to seat thetastener head in the slot 28. The engagement of the tool With the i astenervvill. thusbe causedto take plae'e smoothly and insuch a manner as to avoid danger. of hreakageot the fastener irrespective oizthe speed at which the tool is revolvingivhen the fastener ispr sented thereto. With this construction no tin-1e is lost in positioning the. articlesupon presentation to the inachine and thus thearticles may be, operated upon in rapid succession as is highly sirahle. V 1

Further to facilitate the entrance of the head of the fastener into the recess 24, the curvature of the portion of the tool Which defines said. recess is reversed atrtheniouth or" the recess, as indicated in Figs 2 and 3, so that the sides of the, recess merge. gradually With the lower face, of; the tool 16. This construction provides flaring nioutlnvl icli will ten d t o guidethe head o;t;the fastener into said jrecess,thus naking it easier 0peratively to engage the tool withtheifastener When; the tool is rotating.

In, operation, a rack containing a number of lasts, shoes and heels clamped together by fasteners F, is placed near the improved machine and an operator takes lthein succes sively from the rack, presents them, rapidly and Without the exercise of any great v ainount of care, to, the machine for thereinoval of the fasteners, anrhthenreturns the-ni'tothe rack.

JVhile one einbodiinent of my invention has; beenillustrated and described, it is not my intention to limit its scope thereby or otherwise: than by the terms Of the appended claim. 7

Having described my invention, .What :I olen) @9118? nd desire'to secure byELetters Patent of the United States is:

A vice for removing screw fasteners-of the t pe provided with a head ini-the form ofai circular. eye comprising a power-driven intoithe recess hile the spindle isrotating." In testimony whereof [have signed my name;tothisspecificatlon. I

EREDERIC zBERTRAND. 

